- weight
- ≈ 1.12 g
- sun
- 1.9× wider
- sky
- bright white
Illustration computed from this world’s measured and derived values, not a photograph.
Kepler-401 d
Kepler-401 d is a confirmed sub-Neptune exoplanet 3,149 ly from Earth in the constellation Cygnus, discovered in 2016 by Kepler.
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.
Standing on Kepler-401 d, you would weigh roughly about 12% more than you do on Earth. Its yellow-white star looks 1.9× wider than ours, bathing the surface in bright white light. A year passes in just 184 days, and at an estimated 107°C (224°F) it is warm.
How closely this world matches Earth in size and warmth, from 0 to 1 (Earth = 1.0). Computed by gravityfinder. See every world ranked →
What these mean: surface gravity · tidal locking · equilibrium temperature · Earth similarity
If your children grew up herea playful thought experiment
Gravity close to Earth's, at about 1.1 times. A child would grow up much as they would back home.
A playful thought experiment from this world’s gravity, not a prediction about any real person. No human has ever grown up off Earth, so no one truly knows; the direction (taller in low gravity, shorter and stockier in high) follows how growing bodies respond to weight.
Hear how a voice sounds herea computed acoustic demo
Your voice would sound noticeably higher and reedier.
Assuming Earth-like air at this world's temperature of about 107°C (224°F), sound would travel roughly 15% faster than on Earth, so your voice would sound noticeably higher and reedier. The real atmosphere is unknown, so this is a best guess.
A real voice sample, pitch-shifted (tempo held constant) to suggest the acoustics: a playful approximation, not a precise simulation. Voice: Lingua Libre / Vealhurl, CC BY-SA 4.0.
- !Persistently hot at around 107°C (224°F), well above anything you would call comfortable.
- Surface gravity is close to Earth's, about 1.12 times, so you would move much as you do here.
A playful read of Kepler-401 d’s measured and computed values, not a real advisory.
How long to get there · 3,149 ly away
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.
What is the gravity on Kepler-401 d?
Kepler-401 d's surface gravity is about 1.1 times Earth's, estimated from its size.
How much would you weigh on Kepler-401 d?
Someone who weighs 150 pounds on Earth would weigh about 168 pounds on Kepler-401 d.
How far is Kepler-401 d from Earth?
Kepler-401 d lies about 3,149 light-years from Earth.
How long would it take to get to Kepler-401 d?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 4.9 million years.
How hot is Kepler-401 d?
Kepler-401 d's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 107°C (224°F).
How long is a year on Kepler-401 d?
Kepler-401 d completes one orbit of its star in 184 days.
Illustration generated from Kepler-401 d's confirmed parameters, not a photograph.